The Sigma 20mm F2 DG DN Contemporary is an ultra-compact and lightweight, wide-aperture, full frame prime lens for Sony E-mount mirrorless cameras. Weighing in at only 370g and measuring just 72.4mm in length, this lens is portable enough for everyday shooting. It’s ideal for landscapes, wide-angle portraits, weddings and interiors, and is particularly well-suited to astrophotography. This lens is designed for mirrorless cameras, offering a balance between performance and size. It features a 20mm focal length, which is a popular ultra-wide-angle. The lens is equipped with a metal, knurled, petal-type lens hood and is compatible with 62mm threaded front filters. It also has an arc-type AF/MF switch, dust and splash-resistant mount, and magnetic lens caps. The fast f/2 maximum aperture makes it suitable for astrophotography, landscapes, cityscapes, street photography, low-light interiors, and night-time situations. It's also ideal for handheld vlogging and video streaming. The f/2 maximum aperture and optical design deliver pleasing bokeh. The lens combination offers a consistent fast aperture. It is designed for full-frame sensor coverage and is exclusive to mirrorless cameras.